During the period, from 1956 to 1958, he had an advanced study in Northern Transportation University and from 1985 to 1986, he studied as a visiting professor in University Akron U.

• 1956-1958年在北方交通大学运输经济学高级研修班进修，1985.；9-1986年8月为美国阿克伦大学访问教授。